Portion of a golf club head



FIG. 1 is a top perspective view of a portion of a golf club head showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a toe end view thereof;

FIG. 5 is a heel end view thereof; and,

FIG. 6 is a top plan view thereof.

The difference in shading between the two shaded regions indicates a contrast of appearance and does not depict any particular color, texture, or material. The broken line immediately adjacent to the shaded region forms an unclaimed boundary of the design. The broken line showing of the remainder of the golf club head is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a golf club head, as shown and described. 